CA-TSS must limit WRITE or greater access to the JES2 System data sets (e.g., Spool, Checkpoint, and Initialization parameters) to system programmers only.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-223907	TSS0-ES-000340	SV-223907r958472_rule		Medium

Description
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000259-GPOS-00100, SRG-OS-000324-GPOS-00125

Description

To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000259-GPOS-00100, SRG-OS-000324-GPOS-00125

STIG	Date
IBM z/OS TSS Security Technical Implementation Guide	2024-06-24

Details

Check Text ( C-25580r516120_chk )
The ESM data set rules for the JES2 System data sets (e.g., Spool, Checkpoint, and Initialization parameters) do not restrict WRITE or greater access to only z/OS systems programming personnel. The ESM data set rules for the JES2 System data sets (e.g., Spool, Checkpoint, and Initialization parameters) allow inappropriate access not documented and approved by ISSO. If both of the above are untrue, this is not a finding. If either of the above is true, this is a finding.

Check Text ( C-25580r516120_chk )

The ESM data set rules for the JES2 System data sets (e.g., Spool, Checkpoint, and Initialization parameters) do not restrict WRITE or greater access to only z/OS systems programming personnel.

The ESM data set rules for the JES2 System data sets (e.g., Spool, Checkpoint, and Initialization parameters) allow inappropriate access not documented and approved by ISSO.

If both of the above are untrue, this is not a finding.

If either of the above is true, this is a finding.

Fix Text (F-25568r516121_fix)
Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes as required to protect JES2 System data sets (spool, checkpoint, and parmlib data sets). Configure WRITE or greater access to JES2 System data sets (spool, checkpoint, and parmlib data sets) to be limited to system programmers only. Access other than this should be documented and approved by the ISSO. (Example: All SYS1.HASP* data sets.)

Fix Text (F-25568r516121_fix)

Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes as required to protect JES2 System data sets (spool, checkpoint, and parmlib data sets).

Configure WRITE or greater access to JES2 System data sets (spool, checkpoint, and parmlib data sets) to be limited to system programmers only.
Access other than this should be documented and approved by the ISSO. (Example: All SYS1.HASP* data sets.)